This is probably a good place where subclipse should pop up a dialog box
with a link to the relevant part of the subversion FAQ.

Mark Phippard wrote:
> On 6/28/07, Bradley Wagner <bradley.wagner@hannonhill.com> wrote:
>> Not sure if this a Subclipse or SVN problem, but when I try to rename a
>> file using the Re-factor menu and only change its case, I get a
>> message that
>> the re-factor failed and there is a red SVN warning in the console:
>>
>>
>> Path is not a working copy directory
>> svn: Path
>> '/Users/bradley/Java/workspace/product/src/java/com/company/object/xml/AFile.java'
>>
>> is not a directory
>>
>> Weird message given that the path its referencing is a file.
>
> This is a limitation of Subversion on case-insensitive file systems
> like Windows and OSX. The easiest workaround is probably to do the
> rename in the repository browser and then update. Of course you lose
> some of the things refactoring will do for you, but that is the only
> way that works.
>